package co.yixiang.common.annotation;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.BeanProperty;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.ser.ContextualSerializer;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

import java.io.IOException;
import java.util.Objects;

public class PrefixionJsonSerializer extends JsonSerializer<String>
        implements ContextualSerializer, ApplicationContextAware {
    private SensitiveStrategy strategy;

    @Override
    public void serialize(String value, JsonGenerator gen, SerializerProvider serializerProvider) throws IOException {
        // 字段序列化处理
        gen.writeString(strategy.desensitizer().apply(value));
    }

    @Override
    public JsonSerializer<?> createContextual(SerializerProvider prov, BeanProperty property) throws JsonMappingException {
        // 判定是否 需要脱敏处理
        //获取敏感枚举
        Sensitive annotation = property.getAnnotation(Sensitive.class);
        //如果有敏感注解，则加入脱敏规则
        if (Objects.nonNull(annotation) && Objects.equals(String.class, property.getType().getRawClass())) {
            this.strategy = annotation.strategy();
            return this;
        }
        return prov.findValueSerializer(property.getType(), property);
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {

    }
}
